Method and apparatus for single source entry of analog and digital data into a computer
Computer interface device
Touch screen form entry system
Interactive overlay driven computer display system
Method and system for inputting coordinates using digitizer Patent #: 5146049
ApplicationNo. 876473 filed on 04/30/1992
US Classes:345/173, Touch panel178/18.01, Position coordinate determination for writing (e.g., writing digitizer pad, stylus, or circuitry)345/156DISPLAY PERIPHERAL INTERFACE INPUT DEVICE
ExaminersPrimary: Oberley, Alvin E.
Assistant: Wu, Xiao
Attorney, Agent or Firm
International ClassG09G 003/02
Foreign Application Priority Data1991-05-09 JP
AbstractA data input apparatus comprising a pen for selectively indicating and inputting desired data; a display unit for displaying an image of the input data; a tablet for obtaining coordinate data by indicating with the pen the position corresponding to a predetermined portion of a pattern displayed on the display unit; means for detecting the coordinate data in response to a downward press of the pen to the tablet, and further detecting the coordinate data in response to an upward lift of the pen from the tablet; means for setting a first region of a predetermined area in the tablet, and also setting a second region which includes the first region and has an area greater than that of the first region; and deciding means for accepting the input data in response to a downward press of the pen to the first region and thereafter settling the input data in response to an upward lift of the pen from the second region. The apparatus is capable of preventing unintentional cancel of the input data that may result from an accidental displacement of the pen-up region beyond-the pen-down region, hence facilitating accurate input of data to consequently realize faster manipulation.